Collision: An event in which two or more bodies exert relatively high forces on each other for a short period of time.
Elastic collision: A collision in which the total kinetic energy of the particles before and after the encounter is the same.
Inelastic collision: A collision in which the total kinetic energy of the particles before and after the encounter is not the same.
The danger of collisions occurs as a result of sudden high acceleration that can damage equipment, cause injuries and even kill. It can cause damage from the deformation of object. It can cause colliding objects to shatter and fly apart at high speeds.
On the other hand collisions can hammer nails. They are used in sports such as pool, golf, and baseball. They have also been used to probe the makeup of matter by way of near light speed collisions inside particle accelerators.
In conclusion collisions are sudden interactions that can be elastic or inelastic. They can be dangerous and destructive but yet they can be useful.
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